Improvement in steam-generators



dilata 'l iaia WALTER G'. SAVAGE, OF KNOXV-ILLE, IOWA.

Letters' Patent no; 109,765, daad November 29, 1870.

IMPROVEMENT IN STEAM-GENERATORS.

The Schedule referrec'x to in these Letters Patent and making part of the same.

' To all whom it may concern l Be it known that I, WALTER G. SAVAGE, of Knoxville, in the county of Marion and in the State of Iowa, have invented certain new and useful Improvements in Steam-Boilers; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had tothe accompanying drawing and to the letters of reference marked thereon making a part of this specification.

The nature of my invention consists in .the construction and arrangement of a steam-boiler, as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction aintoperat-ion,referring to the annexed drawing, in which- Figure lis a perspective view of my boiler made in sections, as will be presentlyvdescribed;

Figure 2 is a side view of the lower portion of one of the sections; and

Figure 3 is a plan view ot' the same.

A represents a vessel, of any desired dimensions and proportions, of cast-iron, with two separate watertubes ruiming from end to end, with eross-,tnbes'at the ends, making a perfect water connection around V the internal diameter of the vessel.

B represents another vessel, of any desired di1nensions and proportions, of cast-iron, with only one water-tube, embracing its whole internal diameter from end to end, snticient to embrace both' the diameters of the tubesot' the vessel A and' lthe tire-space between them. Y

The vessel A is placed on a foundation, C, within which is the fire-box E, and vertical tubes D D, of

. any desired length and of any desired number,l connect the tivo water-tubes of said vessel with the vessel B above, making aperfect circulation of water. from the bottom vessel A to the upper vessel B, and forming one section of my boiler. n The two vessels A and B are forced and held iirml y together, on the ends of the tubes D D, by bolts a a, through each end tube from top to bottom through both vessels, making steam-tight joints between tubes and vessels without packing.

The entire boiler is made 'by connecting' as many of these cross-sections A B D as it takes to make the power desired.

rlhese cross-sections are connected by having, at'

- vessel, and so on continuously making a steam-tight joint drawn together by a bolt, d, passing through all the vessels, said bolt also connecting an elbow, I, at the outer end of both the first and last section, to receive and blow out the water.

Through one end of each water-'tube in the lower vessel A entersa rod, f, surrounded at the end of the tube by a stuffing-box, g, and provided at its in'- ner end wit-h a scraper, e, to'r cleaning out the sediment.` ,It will be seen that in a boiler thus constructed the water occupies the tubes instead of the lire, thus separating the water into small bodies, receiving the quickest possible steam generating heat from the least amount of fire, and the lire is preserved as much as possible in one intense body surrounding the tensity.

As the tubes can be placed as close as re can be made to draw-weibl can get the greatest possible amount of effective fire-surface to operate fon the ,greatest possible amount of steam-generating surface that can be obtained in any form.

'lhe locomotive or tubular boiler can get its firesurface, .but the moment the fire starts from the lire- 'water-tuhes, with litt-le to separate and destroy its inbox into the flue it begins to lose-its intensity and is soon blown out, the draught carrying away the various gases that should be burned. Y

These gases are burned by my arrangement.

My boileris also perfectly safe from explosion from the fact that all the tubes ot' water tha/t are exposed to weakness from the tirel are so small that their bursting could not make an explosion,'and the dome J on top of the upper vessels B B, with said upper vessels, is not exposed to the tire.

The water is run into the boiler tothe water-gauge in the dome.

The sediment Scrapers e e are worked, at the pleas These sedimcnt-'scrapers are very important, as

they allow me to use these small water lines at the bottom of my boiler, that gives me the spaces to have the re rise alike in'all parts ot the boiler, while I get a large number oftubes in a very small space, all effective steam-generating surface.

Also, the elongated head or vessel B, while it forms a head for the tubes D D, becomes a cylinder itself for water, superseding the round head in that it can readily be cleaned out.

One cross-section forms a boiler complete in itself, and as many sections as may be desired canbe connected together, forming any-sized boiler required.

The sections can easily be taken down and to pieces in n few minutes, if desired, to clean, or for :my other purpose.

They are perfectly portable, and cnn be handled in sections-or in parts, as desired.

i I am aware that a boiler in which the products of combustion circulate 'around water-tubes is not new; hence I do not broadly claim such to be my invention.

That I claim isf- One or more primary boilers, A constructed as described, and connected to one or more secondary bolers, B, by n. series of water-tubes, D D, the latter being snr-mounted by a. dome, J, the primary boilers and pipes being incased, and all arranged und used as and for the purposes set forth.

In testimony that I claim Jche feregoingLI have hereunto set my hand this 29th day of March, 1870.

WALTER. G. SAVAGE.

' \Vitnesses:,

C. J. H. Bnos'r, GEO. KINGK. 

